Visible – hickness- each piece of paper has gone through rigorous quality testing. Thickened eye protection writing paper, not easy to penetrate, feels delicate, smooth writing, not frizzy, line spacing moderate, easy to view. Exquisite and compact, out of the house can be put into the pocket, writing at any time without restrictions. Skin feels leather surface, comfortable, waterproof, and wear-resistant. A variety of colors to meet different needs of choice. Lock wire binding can be 180?? flat. Horizontal lines or blank writing pages, work, study, and life are all applicable.